AN ANALYSIS OF EQUILIBRIUM RELATIONSHIP BETWEEN PRICE ELASTICITY AND EXPENDITURE LEVEL: A CASE STUDY OF KOREAN MOBILE MARKET DATA

In most developing countries, telecommunications industry has been grown fast and still has more growth potential than in the developed countries. Clearly the telecommunications industry contributes to foster economic developments and also to narrow the communication gaps among countries. Among many components relating to the success of quick developments of telecommunication services, an appropriate and optimal pricing strategies is the most vital element. In this view point, this paper examines the optimal price discrimination strategy for firms in a monopolistically competitive market. The primary interest is the theoretical relationship between price elasticity and the average expenditure level of consumers. Our equilibrium analysis shows that the relationship can go either way (positive or negative) depending on the prevailing price level of the product in concern. As an empirical example, using a hierarchical Bayes model we find that heavy user of mobile service are substantially more elastic to the price of calls in Korea. A discussion of the optimal pricing scheme and market structure is in order.Price Discrimination, Price Elasticity, Price Sensitivity, Mobile Telecommunications, Hierarchical Bayes Model

The Inter-Store Mobility of Supermarket Shoppers

The allegiance of a particular customer, and the distribution across customers of strength of affiliation to a store are important indicators of store health. It is therefore important to understand the extent and determinants of shopper mobility among competing retailers. While shoppers often patronize many stores, they typically have a primary affiliation to a “main store” that captures the majority of their purchases. We examine, in detail, the tendencies of shoppers to transition away from the current main store and adopt another in its place. That is, rather than study all types of store switching behavior, we focus on the decision to change primary allegiance. The model is established in a discrete time hazard framework and estimated as random-effects probit. Data from 548 households taking 88,945 shopping trips among five stores are used to calibrate the model. We find that state dependence is prevalent with nearly three quarters of the shoppers showing progressive attachment to their current main store. Interestingly, this finding is not simply driven by location (i.e., because shoppers are captive to a single store based on geographical distance). More likely, shoppers are unwilling to give up the benefits of store-specific knowledge of assortment, layout and prices. Second, the decision to transition from a current main store is not influenced by temporary price promotions on a common basket of items: Shoppers will cherry-pick, but this alone does not cause them to change primary allegiance. The majority of transitions occur across competing stores of the same price format, which suggests “format loyalty” is an important aspect of shopper behavior. After controlling for unobserved heterogeneity, we find little relationship between observable demographics and the transition probability. We do, however, find that shoppers who spend more per trip are less likely to change main stores, as are less frequent shoppers. Implications for retail management strategy are discussed

Effects of Mergers and Competition on Consumer Benefits in the Multi-Channel Video Programming Industry in Korea

This article examines the welfare benefits of cable television (CATV) merger and acquisitions in the multi-channel video programming distribution (MVPD) market. In particular, it seeks to answer whether cable subscribers are better off in competitive markets than in concentrated markets. This article estimates the impact of mergers by examining Korea's regional market-share data for MVPD operators with a hierarchical-choice model. First, the estimation results show that the consumer value of the CATV platform, in terms of the category values in a nested logit model, was significantly lower in the concentrated markets than in the more competitive markets. Second, the study compares these findings with those in the literature about the U.S. market. The following question is prompted: Why is direct broadcast satellite competitive with CATV in the United States but not in Korea? This article points out that differences in regulatory policies, particularly as they relate to the treatment of vertically integrated networks, do have significant effects on the effective boundary of MVPD competition across platforms. To support this argument, this article provides details on the policies and market characteristics of the Korean MVPD industry.

Fixed-to-mobile call substitution and telephony market definition in Korea

Market definition, Telecommunications, Conjoint analysis, Hierarchical Bayes model, Critical loss analysis, L51 (Economics of regulation), L96 (Telecommunications),